Cardinality in an Entity-Relationship diagram

PYQ RPSC Programmer 2013

1. A.

   refers to the number of higher level entities that are used in the ER model

2. B.

   is used to show the ratio of one entity in relationship to another entity

3. C.

   is used to show the order of the relationships between two entities

4. D.

   gives the count of the number of entities involved in a single relationship

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